CD274 expression in cholangiocarcinoma specimens and prognosis of cholangiocarcinoma patients. (a) Normal bile duct staining with an anti-CD274 antibody. Bar, 100 μm. (b,c) Representative results of the anti-CD274 staining of clinical specimens obtained from 91 patients by surgical resection. CD274 immunohistochemistry was scored as described in Materials and Methods. Bar, 100 μm. (d) Kaplan–Meier analysis for the disease-specific survival rate of the two groups.
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